Buchan Duncan S, McSeveney Fiona, McLellan Gillian
Institute of Clinical Exercise and Health Science, The University of the West of Scotland, Hamilton, UK.
Clin Physiol Funct Imaging. 2019 Jan;39(1):51-56. doi: 10.1111/cpf.12538. Epub 2018 Jul 30.
The purpose of this study was to evaluate the agreement between several activity measures using raw acceleration data from accelerometers worn concurrently on the dominant and non-dominant wrist. Fifty-five adults (31·9 ± 9·7 years, 26 males) wore two ActiGraph GT3X+ monitors continuously for 1 day, one on their non-dominant wrist and the other on their dominant wrist. Paired t-tests were undertaken with sequential Holm-Bonferroni corrections to compare wear time, moderate-vigorous physical activity (MVPA), time spent in 10-min bouts of MVPA (MVPA ) and the average magnitude of dynamic wrist acceleration (ENMO). Level of agreement between outcome variables from the wrists was examined using intraclass correlation coefficients (ICC, single measures, absolute agreement) with 95% confidence intervals and limits of agreement (LoA). Time spent across acceleration levels in 40 mg resolution were also examined. There were no significant differences between the non-dominant and dominant wrist for ENMO, wear time, MVPA or MVPA . Agreement between wrists was strong for most outcomes (ICC ≥0·92) including wear time, ENMO, MVPA, MVPA and the distribution of time across acceleration levels. Agreement was strong in the low acceleration bands (ICC = 0·970 and 0·922) with a mean bias of 3·08 min (LoA -55·18 to 61·34) and -5·43 (LoA -43·47 to 32·62). In summary, ENMO, MVPA, MVPA , wear time and the distribution of time across acceleration levels compared well at the group level. The LOA from the two lowest acceleration levels suggest further work over a longer monitoring period is needed to determine whether outputs from each wrist are comparable.
本研究的目的是评估使用同时佩戴在优势手腕和非优势手腕上的加速度计的原始加速度数据得出的几种活动测量方法之间的一致性。55名成年人（年龄31.9±9.7岁，男性26名）连续1天佩戴两台ActiGraph GT3X+监测器，一台戴在非优势手腕上，另一台戴在优势手腕上。采用配对t检验并进行序贯霍尔姆-邦费罗尼校正，以比较佩戴时间、中度至剧烈身体活动（MVPA）、以10分钟为一段的MVPA时间（MVPA段）以及动态手腕加速度的平均幅度（ENMO）。使用组内相关系数（ICC，单一测量，绝对一致性）及95%置信区间和一致性界限（LoA）来检查来自两只手腕的结果变量之间的一致性水平。还检查了40mg分辨率下不同加速度水平的时间分布。对于ENMO、佩戴时间、MVPA或MVPA段，非优势手腕和优势手腕之间没有显著差异。对于大多数结果（ICC≥0.92），包括佩戴时间、ENMO、MVPA、MVPA段以及不同加速度水平的时间分布，两只手腕之间的一致性很强。在低加速度频段一致性很强（ICC = 0.970和0.922），平均偏差分别为3.08分钟（LoA -55.18至61.3）和-5.43（LoA -43.47至32.62）。总之，在组水平上，ENMO、MVPA、MVPA段、佩戴时间以及不同加速度水平的时间分布比较一致。来自两个最低加速度水平的LoA表明，需要在更长的监测期内进一步研究，以确定每只手腕的输出是否具有可比性。
